#include<stdio.h>

int main()
{
	int u,d,n,flag,sign,h=0,min=0;
	scanf("%d %d %d",&n,&u,&d);
	while(h<n)
	{
		h+=u;
		min++;
		if(h<n)
		{
			h-=d;
			min++;
		}
		else break;
	}
	printf("%d",min);
	return 0;
}
